Windows 8.1 requires MDT 2013 and Windows ADK 8.1, at this moment just to get a quick result to see if it resolves your error is to use a CLEAN! virtual machine (or any machine you can use that is ready) to install MDT 2013 and Windows ADK 8.1. Then open
your deploymentshare (even if it is located on another computer/server/smb share) and update your deployment share, so new boot images can be created.

Since the error you have provided in the logfiles is a DISM error, it may be related to this issue. But there is also 1 other thing you can look at, and that is the DISM.log, this is located in C:\Windows\Logs\DISM\DISM.log. There you will find a more specific
error description!

Good luck and keep us posted! :)

If this post is helpful please click "Mark for answer", thanks! Kind regards

Be sure that "Windows Automated Installation Kit" previously used for older MDT is uninstalled.

Be sure to regenerate a new boot image with the drivers of your machines and import the new boot image into WDS.

If I were you, I'd check the "Unattend.xml" parameters as well :

- Edit your task sequence
- Under OS Info tab > Edit Unattend.xml
- Load a catalog from the DVD source of Windows for instance
- Open Tools > Validate Answer File
- Check any message in the bottom window
- You should see for instance: "Setting DisableWelcomePage is deprecated in the Windows image"
- Double click the messages and fix the errors if exist

I ran into the same issue - here are the steps I took to correct it. This is assuming you have already installed Windows ADK and MDT 2013. Open Deployment Workbench - right click your MDT Deployment share and select Upgrade.

*NOTE* Check your Windows Deployment Services applet under Boot Images and look for the OS Version tab it probably reads 6.1.7600 or something to that effect. This is the PE image for Windows 7 and below. The following fix should update you to version 6.3.9600
that supports Windows 8.1 and Server 2012 R2.

4. Right click your Lite Touch Windows PE image (in my case there are two x86 and x64) and select Replace Image. When the window opens it will ask you where your WinPE images are located - select the Browse button.

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